hanger-on
nounUK /ˌhæŋ.ərˈɒn/
US /ˌhæŋ.ɚˈɑːn/
A hanger-on is someone who stays close to a person or group just to get things for themselves.
The famous singer was tired of the hanger-on who always asked for free tickets.
OTHER MEANINGS
2. A person who follows a group or leader without being a real member.
Several hangers-on trailed after the band wherever it toured.
3. Someone who stays around a place or person hoping to gain an advantage.
The politician's office was full of hangers-on looking for jobs.
4. A person who attaches themselves to a successful person or organization.
After the company became famous, a crowd of hangers-on appeared at every event.